Online PHP editor | rfc for ofhSD

@ 2013-11-12T12:41:02Z

<?php

    function getTree(array $array)
    {
       $level = 0;
       $tree  = [];
       $stack = [&$tree];
       foreach($array as $item)
       {
          if($item['level']>$level) //expand stack for new items
          {
             //if there are child elements, add last to stack:
             $top = key($stack);
             if(count($stack[$top]))
             {
                end($stack[$top]);
                $stack[] = &$stack[$top][key($stack[$top])];
             }
             //add ['children'] dim to top stack element
             end($stack);
             $top = key($stack);
             $stack[$top]['children'] = [];
             $stack[] = &$stack[$top]['children'];
          }
          while($item['level']<$level--) //pop till certain level
          {
             //two times: one for last pointer, one for ['children'] dim
             array_pop($stack);
             array_pop($stack);
          }
          //add item to stack top:
          end($stack);
          $stack[key($stack)][] = $item;
          $level = $item['level'];
       }
       return $tree;
    }

$array = [
  ['level'=>1, 'name' => 'Root #1'],
  ['level'=>1, 'name' => 'Root #2'],
  ['level'=>2, 'name' => 'subroot 2-1'],
  ['level'=>3, 'name' => '__subroot 2-1/1'],
  ['level'=>2, 'name' => 'subroot 2-2'],
  ['level'=>1, 'name' => 'Root #3']
];

print_r(getTree($array));

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [children] => Array ( [0] => Array ( [level] => 1 [name] => Root #1 ) [1] => Array ( [level] => 1 [name] => Root #2 [children] => Array ( [0] => Array ( [level] => 2 [name] => subroot 2-1 [children] => Array ( [0] => Array ( [level] => 3 [name] => __subroot 2-1/1 ) ) ) [1] => Array ( [level] => 2 [name] => subroot 2-2 ) ) ) [2] => Array ( [level] => 1 [name] => Root #3 ) ) )

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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